Dear Uli, It sounds like you and I are having the same problem. T. brachyceras hasn't reappeared since the first year where it grew outside and bloomed. I was hoping maybe if they were kept warm in summer I could change that but it sounds like those are the conditions yours have. One year I soaked my Ornithogalum bulbs in kelp and some of them came up. I had forgotten I tried that until Rachel reminded me. Ornithogalum dubium is so gorgeous when it blooms that I keep giving my dormant pots one more chance. A few bulbs are coming up this year, but so far only one in many pots. As long as that one blooms however I'll be happy. I bought a bunch very cheaply one year at a chain garden store and they all did great. What do you suppose sellers do to them to make them bloom? I have Albucas (now Ornithogalums) who also stay under ground and Lapeirousia and Moraeas often sit out the year. Cyanella is another one that is temperamental. After a couple of years you decide to throw them out and when you dump the pot out they are there looking just fine. Mary Sue